Cisco IP Phones Remote Code Execution and Denial of Service (CVE-2020-3111)

high Tenable OT Security Plugin ID 502099

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability in the Cisco Discovery Protocol implementation for the Cisco IP Phone could allow an unauthenticated, adjacent attacker to remotely execute code with root privileges or cause a reload of an affected IP phone. The vulnerability is due to missing checks when processing Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to the targeted IP phone. A successful exploit could allow the attacker to remotely execute code with root privileges or cause a reload of an affected IP phone, resulting in a denial of service (DoS) condition. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

Plugin Details

Severity: High

ID: 502099

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 3/18/2024

Updated: 3/18/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

Vector: CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2020-3111

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ip_phone_6821_firmware, cpe:/o:cisco:ip_phone_6841_firmware, cpe:/o:cisco:ip_phone_6851_firmware, cpe:/o:cisco:ip_phone_6861_firmware, cpe:/o:cisco:ip_phone_6871_firmware, cpe:/o:cisco:ip_phone_7811_firmware, cpe:/o:cisco:ip_phone_7821_firmware, cpe:/o:cisco:ip_phone_7841_firmware, cpe:/o:cisco:ip_phone_7861_firmware, cpe:/o:cisco:ip_phone_8811_firmware, cpe:/o:cisco:ip_phone_8841_firmware, cpe:/o:cisco:ip_phone_8845_firmware, cpe:/o:cisco:ip_phone_8851_firmware, cpe:/o:cisco:ip_phone_8861_firmware, cpe:/o:cisco:ip_phone_8865_firmware, cpe:/o:cisco:wireless_ip_phone_8821-ex_firmware, cpe:/o:cisco:wireless_ip_phone_8821_firmware

Required KB Items: Tenable.ot/Cisco

Exploit Ease: No known exploits are available

Patch Publication Date: 2/5/2020

Vulnerability Publication Date: 2/5/2020

Reference Information

CVE: CVE-2020-3111

CWE: 20

Detections

Analytics